Tracing Douglas family roots - unraveling history, one generation at a time.

![]() | Mahon O'brien |
| Mahon O'brien | |
| D: | Yes, date unknown |
![]() | Elizabeth of Ara O'brien |
| Elizabeth of Ara O'brien | |
| D: | Yes, date unknown |
| Donnchadh (of Carrigogunnll) Macbrien | |
| D: | 1502 |
![]() | Margaret O'kennedy |
| Margaret O'kennedy | |
| D: | Yes, date unknown |
![]() | Brian Dudh Mac Conconchobaid O'brien |
| Brian Dudh Mac Conconchobaid O'brien | |
| D: | Yes, date unknown |
![]() | Domhnall (Bishop of Limmerick) O'brien |
| Domhnall (Bishop of Limmerick) O'brien | |
| D: | Yes, date unknown |
![]() | Dermond O'brien |
| Dermond O'brien | |
| D: | Yes, date unknown |
|
| Conchobhar O'brien King of Thomond | |
| D: | 13 Apr 1426 |
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